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If you donвЂ™t have any on hand, you're stuck until you scrounge some from the junk drawer or a TV remote, or go out to the store. With a battery-powered mouse, you will need replacement cells to continue using it.

Because the power cable can plug into the mouse to create a wired connection, you never really have to worry about running out of power. While thatвЂ™s great, we still prefer batteries you can recharge. Disposable batteries can go for very long stretches (often months, sometimes even years) without needing to be replaced. (USB-C is easier to plug in and can supply more power.)ДЇor some wireless mice, particularly low-end and midrange devices, manufacturers may opt to rely on disposable AA or AAA batteries, instead. Most wireless mice feature built-in lithium-ion batteries, which can be recharged using a micro-USB or, less commonly, a USB Type-C cable. What kind of battery a mouse uses, how long it lasts, and even how it's charged can all vary, especially in high-end gaming gear. The power source is the second major consideration specific to picking a wireless mouse.

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This way, if you forget to charge your mouse or leave it on overnight too many times in a row (and we've all done it), a dead battery won't prevent you from using your mouse and, potentially, your PC while it juices back up. In addition to its wireless-connection options, a good wireless mouse will also work as a wired mouse using the charging cable. But having the option for both is best, especially for productivity-focused models.

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In the end, choosing 2.4GHz versus Bluetooth comes down to the computer to which you'll connect your mouse. Also, in some newer wireless mice, Bluetooth winds up draining less power than 2.4GHz, leading to longer battery life. If you want to connect to a device without an open USB port for a 2.4GHz dongle, such as a phone or tablet, youвЂ™ll need Bluetooth. Luckily, the 2.4GHz connection has become the de facto standard in modern mice: Even cheap gear tends to prefer it. Bluetooth signals can be spotty, especially in public spaces with many Bluetooth devices in operation, which can introduce additional input lag. While both connections work well most of the time, the 2.4GHz kind tends to be a little more stable. A few models support both types of connection in one mouse.

Some mice, particularly models made for the office or mobile use, connect via Bluetooth, which doesnвЂ™t require any additional hardware assuming the client computer supports Bluetooth connectivity. The majority make use of a 2.4GHz radio-based connection, which syncs with a USB dongle you plug into your PC or Mac.

Like wireless keyboards, most wireless mice offer one of two ways to connect to devices. Though the bar for making a usable wireless mouse is higher than a wireless keyboard, where it's easier to tolerate a little input lag, plenty of companies out there now make products that feel indistinguishable from their cable-bound counterparts. Likewise, better batteries and more efficient hardware have made charging a once-in-a-while concern, rather than a frequent one. New and improved versions of the technologies that mouse makers use to connect devices over the air have made a stable, nearly lag-free connection the norm for high-quality wireless gear. Wireless mice have come a long way in the past few years.

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